Click Quickstart (http://click.pocoo.org/5/quickstart)

ckick.py

import click

class Config(object):
    def __init__(self):
        self.verbose = False

pass_config = click.make_pass_decorator(Config, ensure=True)

@click.group()
@click.option('--verbose', is_flag=True)
@pass_config
def cli(config, verbose):
    config.verbose = verbose


@cli.command()
@click.option('--string', default='World', help='Object to be greeted')
@click.option('--repeat', default=1, help='Number of times to be greeted')
@click.argument('out', type=click.File('w'), default='-', required=False)
@pass_config
def say(config, string, repeat, out):
    """This script greets you"""
    if (config.verbose):
        click.echo('We are in verbose mode')
    for count in xrange(repeat):
        click.echo('Hello %s!' % string, file=out)

setup.py

from setuptools import setup

setup(
    name='Hello World',
    version='1.0',
    py_modules=['click'],
    install_requires=[
        'click',
    ],
    entry_points='''
        [console_scripts]
        click=hello:cli
    '''
)